/**
 * @author      Roland Franssen <franssen.roland@gmail.com>
 * @website     http://roland.devarea.nl/dialog/
 * @copyright   2008 http://roland.devarea.nl/dialog/
 * @license     MIT
 * @version     2.1
 **/

var Dialogs = {
    Lang:{
        close:   '&nbsp;&times;&nbsp;',
        prev:    '&laquo; Previous',
        next:    'Next &raquo;',
        loading: 'Loading...',
        ok:      'OK',
        yes:     'Yes',
        no:      'No'
    },
    Default:{
        handle:         null,                    // css rule | element | null
        autoOpen:       false,                   // true | false
        background:     ['#000', '#fff'],        // array
        width:          'auto',                  // auto | max | integer
        height:         'auto',                  // auto | max | integer
        minWidth:       null,                    // null | pixel value
        minHeight:      null,                    // null | pixel value
        innerScroll:    true,                    // true | false
        opacity:        .75,                     // float | false
        margin:         10,                      // integer
        padding:        10,                      // integer
        title:          null,                    // string | null
        className:      null,                    // string | null
        content:        null,                    // string | element | array | object | function
        iframe:         null,                    // string | null
        target:{
            id:           null,                    // string | null
            auto:         true                     // true | false
        },
        ajax:{
            url:          null,                    // string | null
            jsonTemplate: null,                    // interpolation template string | null
            options:      {}                       // default ajax options
        },
        close:{
            link:         true,                    // true | false
            esc:          true,                    // true | false
            overlay:      true                     // true | false
        },
        beforeOpen:     Prototype.emptyFunction, // function
        afterOpen:      Prototype.emptyFunction, // function
        beforeClose:    Prototype.emptyFunction, // function
        afterClose:     Prototype.emptyFunction, // function
        afterClick:     Prototype.emptyFunction, // function
        afterIframeLoad:Prototype.emptyFunction  // function
    },
    Browser:{
        IE6:(Prototype.Browser.IE && parseInt(navigator.appVersion) == 4 && navigator.userAgent.toLowerCase().indexOf('msie 6.') != -1)
    }
};

Object.extend(Dialogs, {
    instance: null,
    _exec:false,
    _open:false,
    _elements:{
        overlay:['div', 'dialog-overlay', 'fixed'],
        container:['div', 'dialog-container', 'fixed'],
        content:['div', 'dialog-content'],
        loading:['div', 'dialog-loading'],
        top:['div', 'dialog-top'],
        bottom:['div', 'dialog-bottom'],
        title:['span', 'dialog-title'],
        close:['a', 'dialog-close'],
        next:['a', null, 'next'],
        prev:['a', null, 'prev'],
        curr:['span', null, 'curr']
    },
    fix:{
        scroll:Dialogs.Browser.IE6,
        select:Dialogs.Browser.IE6
    },
    view:function(){
        var view = document.viewport,
        dim  = view.getDimensions(),
        data = {
            width:dim.width, 
            height:dim.height
        };
        if(Dialogs.fix.scroll){
            var scroll = view.getScrollOffsets();
            data.top  = scroll.top;
            data.left = scroll.left;
        }
        return data;
    },
    elm:function(elm){
        return Dialogs._elements[elm];
    },
    load:function(){
        if(!!Dialogs._exec) return;
        Dialogs._exec = true;
        var e = Dialogs._elements;
        for(var x in e){
            var d = e[x],
            a = {
                style:'display:none'
            };
            if(d[1]) a['id'] = d[1];
            //~ if(d[2]) a['className'] = d[2];
            switch(d[0]){
                case 'a':
                    a['href'] = 'javascript:;';
                    break;
            }
            var el = new Element(d[0], a);
            if(d[2]) {
                el.addClassName(d[2]);
            }
            if(Dialogs.Lang[x]) el.update(Dialogs.Lang[x]);
            Dialogs._elements[x] = el;
        }

        $(document).observe('dom:loaded', Dialogs._insertElements);
    },

    _insertElements: function()
    {
        if(!!Dialogs._inserted) return;
        Dialogs._inserted === true;
        var e = Dialogs._elements;
        $(document.body)
        .insert({
            top: e['overlay']
        })
        .insert({
            top: e['container']
            .insert(e['top']
                .insert(e['title'])
                .insert(e['close'])
                )
            .insert(e['content'])
            .insert(e['bottom']
                .insert(e['prev'])
                .insert(e['curr'])
                .insert(e['next'])
                )
        });
        if(Dialogs.Browser.IE6) e['top'].insert(new Element('div', {
            style:'clear:both'
        }));
    },

    close:function(){
        Dialogs.instance = null;
        [Dialogs.elm('title'), Dialogs.elm('content'), Dialogs.elm('curr')].invoke('update', '');
        for(var x in Dialogs._elements) Dialogs._elements[x].writeAttribute('style', 'display:none');
        Dialogs.elm('container').setStyle('left:-99999px;top:-99999px');
        if(Dialogs.fix.select)
            $$('select.dialog-hideselect').invoke('show').invoke('removeClassName', 'dialog-hideselect');
        Dialogs._open = false;
    },
    alert:function(s){
        var o = new Element('input', {
            value:Dialogs.Lang.ok, 
            type:'button'
        }),
        a = new Dialog({
            className:'alert',
            close:{
                link:false, 
                esc:true
            },
            padding:20,
            content:function(){
                o.observe('click', Dialogs.close);
                return [s, '<br /><br />', o];
            },
            afterOpen:function(){
                o.focus();
            }
        });
        a.open();
    },
    confirm:function(s, y_call, n_call){
        var y = new Element('input', {
            value:Dialogs.Lang.yes, 
            type:'button'
        }),
        n = new Element('input', {
            value:Dialogs.Lang.no, 
            type:'button'
        }),
        c = new Dialog({
            className:'confirm',
            close:{
                link:false
            },
            padding:20,
            content:function(){
                y.observe('click', function(){
                    if(Object.isFunction(y_call)) y_call();
                    else Dialogs.close();
                });
                n.observe('click', function(){
                    if(Object.isFunction(n_call)) n_call();
                    else Dialogs.close();
                });
                return [s, '<br /><br />', y, n];
            },
            afterOpen:function(){
                y.focus();
            }
        });
        c.open();
    }
});
Dialogs.load();
var Dialog = Class.create();
Dialog.prototype = {
    initialize:function(opt){
        if (! Dialogs._inserted) {
            Dialogs._insertElements();
        }
        this.opt = Object.extend(Object.clone(Dialogs.Default), opt || {});
        var c = this.opt.content;
        if(Object.isFunction(c))
            Object.extend(this.opt, {
                content:c()
            });
        c = this.opt.content;
        if(Object.isString(this.opt.target.id) || Object.isElement(this.opt.target.id)){
            var b = $(this.opt.target.id);
            Object.extend(this.opt, {
                content:b.innerHTML
            });
            if(this.opt.target.auto){
                var a = /#(.+)$/.exec(window.location);
                if(Object.isArray(a) && Object.isString(a[1])){
                    a = a[1].split(',').last();
                    if(a == b.identify()) this.open.bind(this).delay(1);
                }
            }
        }else if(Object.isHash(c))
            this.steps = {
                i:0,
                k:c.keys(),
                v:c.values(),
                m:c.size()
            };
        this.attachEvents();
        if(this.opt.autoOpen) this.open();
        Dialogs.instance = this;
    },
    exec:function(bool){
        return Dialogs._open == this._open && Dialogs.elm('overlay').visible() && bool;
    },
    attachEvents:function(){
        Event.observe(window, 'resize', this.setDimensions.bindAsEventListener(this));
        if(Dialogs.fix.scroll)
            Event.observe(window, 'scroll', this.setScroll.bindAsEventListener(this));
        var handles = [];
        if(Object.isElement(this.opt.handle)) handles.push($(this.opt.handle));
        else if(Object.isArray(this.opt.handle)) this.opt.handle.each(function(handle){
            handles.push($(handle));
        });
        else if(Object.isString(this.opt.handle)) handles = $$(this.opt.handle);
        handles.invoke('show').invoke('observe', 'click', function(e){
            e.stop();
            if(Object.isFunction(this.opt.afterClick)) this.opt.afterClick(e);
            this.open();
        }.bindAsEventListener(this));
        Dialogs.elm('close').observe('click', function(){
            if(this.exec(this.opt.close.link)) this.close();
        }.bindAsEventListener(this));
        Dialogs.elm('overlay').observe('click', function(){
            if(this.exec(this.opt.close.overlay)) this.close();
        }.bindAsEventListener(this));
        document.observe('keyup', function(e){
            if(this.exec(this.opt.close.esc && (e.which || e.keyCode) == Event.KEY_ESC)) this.close();
        }.bindAsEventListener(this));
        if(this.steps){
            [Dialogs.elm('prev'), Dialogs.elm('next')].invoke('observe', 'click', this.setSteps.bindAsEventListener(this));
            document.observe('keydown', function(e){
                var c = e.which || e.keyCode;
                if(this.exec((c == Event.KEY_LEFT) || (c == Event.KEY_RIGHT))) this.setSteps(e);
            }.bindAsEventListener(this));
        }
    },
    setAuto:function(){
        this.auto = {
            max:0
        };
        var t = Dialogs.elm('title'), c = Dialogs.elm('close');
        [t,c].invoke('setStyle', 'float:none');
        $w('top content bottom').each(function(b){
            var e = Dialogs.elm(b);
            if(!e.visible()) this.auto[b] = {
                width:0,
                height:0
            };
            else{
                e.writeAttribute('style', 'display:inline;float:left;overflow:visible;white-space:nowrap');
                this.auto[b] = e.getDimensions();
                e.writeAttribute('style', 'overflow:hidden');
                if(b == 'content') this.auto[b].width += (parseInt(this.opt.padding) || 0) * 2;
                if(this.auto[b].width > this.auto.max) this.auto.max = this.auto[b].width;
            }
        }.bind(this));
        t.setStyle('float:left');
        c.setStyle('float:right');
    },
    setDimensions:function(){
        if(!this.exec(true)) return;
        this.setAuto();
        var a = this.auto,
        d = Dialogs.view(),
        t = Dialogs.elm('content'),
        c = Dialogs.elm('container'),
        o = {
            m:((parseInt(this.opt.margin) || 0) * 2),
            p:((parseInt(this.opt.padding) || 0) * 2),
            t:a.top.height,
            b:a.bottom.height
        },
        m = {
            width:(d.width-o.m), 
            height:(d.height-o.m-o.t-o.b)
        },
        h = this.opt.height,
        w = this.opt.width,
        x = y = false;
        if(Object.isNumber(w)) w += o.p;
        if(w == 'max') w = m.width;
        if(!Object.isNumber(w)) w = a.max;
        if(w < (this.opt.minWidth || 0)) w = this.opt.minWidth || 0;
        if(w > m.width){
            w = m.width;
            x = true
        }
        t.setStyle('width:'+(w-o.p)+'px;height:auto');
        if(Object.isNumber(h)) h += o.p;
        if(h == 'max') h = m.height;
        if(!Object.isNumber(h)) h = t.getHeight()+o.p;
        if(h < (this.opt.minHeight || 0)) w = this.opt.minHeight || 0;
        if(h > m.height){
            h = m.height;
            y = true;
        }
        t.setStyle('height:'+(h-o.p)+'px;padding:'+(o.p/2)+'px');
        if(this.opt.innerScroll && (x || y)) t.setStyle('overflow:scroll');
        var s = {
            w:w,
            h:(h+o.t+o.b)
        };
        c.setStyle('width:'+s.w+'px;height:'+s.h+'px;top:50%;left:50%;margin:-'+parseInt(s.h/2)+'px 0 0 -'+parseInt(s.w/2)+'px');
        if(Dialogs.fix.scroll){
            Dialogs.elm('overlay').setStyle('width:'+d.width+'px;height:'+d.height+'px');
            this.setScroll();
        }
    },
    setScroll:function(){
        if(!this.exec(true)) return;
        var v = Dialogs.view(),
        c = Dialogs.elm('container'),
        d = c.getDimensions(),
        t = v.top + parseInt((v.height - d.height) / 2),
        l = v.left + parseInt((v.width - d.width) / 2);
        c.setStyle('margin:0;top:'+t+'px;left:'+l+'px');
        Dialogs.elm('overlay').setStyle('margin:'+v.top+'px 0 0 '+v.left+'px');
    },
    setLoad:function(){
        var l = Dialogs.elm('loading').show(),
        t = Dialogs.elm('content'),
        b = t.down('#'+l.identify());
        if(!Object.isElement(b)) t.insert(l);
    },
    setAjax:function(){
        this.setLoad();
        var o = this.opt.ajax.options || {},
        c = (o.onComplete && Object.isFunction(o.onComplete) ? o.onComplete : null),
        a = function(t){
            var tpl = this.opt.ajax.jsonTemplate;
            if(t.responseJSON && Object.isString(tpl)) Dialogs.elm('content').update(tpl.interpolate(t.responseJSON));
            else Dialogs.elm('content').update(t.responseText || '');
            this.setImages();
            this.setDimensions();
            if(Object.isFunction(c)) c(t);
        }.bind(this);
        Object.extend(o, {
            onComplete:a
        });
        new Ajax.Request(this.opt.ajax.url, o);
    },
    setIframe:function(){
        this.setLoad();
        var f = new Element('iframe', {
            src:this.opt.iframe, 
            frameborder:0, 
            id:'dialog-iframe'
        });
        Dialogs.elm('content').insert(f);
        f.observe('load', function(){
            Dialogs.elm('loading').hide();
            f.setStyle('width:100%;height:100%');
            this.setDimensions();
            if(Object.isFunction(this.opt.afterIframeLoad)) this.opt.afterIframeLoad.call(this);
        }.bindAsEventListener(this));
    },
    setSteps:function(ev){
        if(!this.exec(true)) return;
        var m = this.steps.m,
        s = false,
        n = Dialogs.elm('next'),
        p = Dialogs.elm('prev');
        if((ev.which || ev.keyCode) == Event.KEY_RIGHT || ev.element().hasClassName('next')){
            if(this.steps.i < (m - 1)) s = true;
            if(s) ++this.steps.i;
            if(((this.steps.i + 1) >= m) && n.visible()) n.hide();
            if(((this.steps.i - 1) >= 0) && !p.visible()) p.show();
        }else{
            if(this.steps.i > 0) s = true;
            if(s) --this.steps.i;
            if(((this.steps.i - 1) < 0) && p.visible()) p.hide();
            if(((this.steps.i + 1) <= m) && !n.visible()) n.show();
        }
        if(s) this.setContent();
    },
    setContent:function(){
        var c = this.opt.content,
        t = Dialogs.elm('content');
        t.update('');
        if(Object.isString(c) || Object.isElement(c)) t.insert(c);
        else if(Object.isArray(c)) c.each(function(b){
            t.insert(b);
        });
        else if(Object.isHash(c)){
            var b = Dialogs.elm('bottom');
            t.update('').insert(this.steps.v[this.steps.i]);
            Dialogs.elm('curr').update(this.steps.k[this.steps.i]);
            if(!b.visible()) b.show().childElements().invoke('show');
            if(this.steps.i <= 0) Dialogs.elm('prev').hide();
            if(this.steps.i >= (this.steps.m - 1)) Dialogs.elm('next').hide();
        }else if(Object.isString(this.opt.ajax.url)) this.setAjax();
        else if(Object.isString(this.opt.iframe)) this.setIframe();
        this.setImages();
        this.setDimensions.bind(this).defer();
    },
    setImages:function(){
        Dialogs.elm('content').select('img').each(function(el){
            el.onload = function(){
                this.setDimensions();
            }.bind(this);
        }.bind(this));
    },
    open:function(){
        if(Object.isFunction(this.opt.beforeOpen)) this.opt.beforeOpen();
        if(Dialogs.fix.select)
            $$('select').select(function(el){
                return el.visible();
            }).invoke('hide').invoke('addClassName', 'dialog-hideselect');
        if(Object.isString(this.opt.title) || this.opt.close.link){
            if(Object.isString(this.opt.title)) Dialogs.elm('title').show().update(this.opt.title);
            if(this.opt.close.link) Dialogs.elm('close').show();
            else Dialogs.elm('close').hide();
            Dialogs.elm('top').show();
        }else Dialogs.elm('top').hide();
        var o = Dialogs.elm('overlay'), c = Dialogs.elm('container'), t = Dialogs.elm('content');
        [o, c, t].invoke('show');
        o.setOpacity(this.opt.opacity || 1).setStyle({
            background:this.opt.background[0] || '#000'
        });
        c.writeAttribute('style', 'left:-99999px;top:-99999px;background:'+(this.opt.background[1] || '#fff'));
        t.writeAttribute('class', this.opt.className || '');
        Dialogs._open = new Date().getTime();
        this._open = Dialogs._open;
        this.setContent();
        if(Object.isFunction(this.opt.afterOpen)) this.opt.afterOpen();
    },
    close:function(){
        if(Object.isFunction(this.opt.beforeClose)) this.opt.beforeClose();
        Dialogs.close();
        if(Object.isFunction(this.opt.afterClose)) this.opt.afterClose();
    }
};